Printing device



Fb.25,194l. vu L.McCARTER.

PRINTING DEVICE Filed May 6, 1959 4 Sheets-Sheet 1 INVENTOR.

Mum/*1 L.Mc CARTER ATTORNEY.

Feb. 25, 1941. w. L. MCCARTER PRINTING DEVICE Filed May a, 1939 4Sheets-Sheet 3 INVENTOR. W/LL/AM L Me CARTER ATTORNEY.

Feb. 25, 1941. a w McCARTER 2,233,217

PRINTING DEVICE Filed May 6, 1939 4 Sheets-Sheet 4 mil/ah MM WWWATTORNEY.

Patented Feb. 25, 1941 PATEN OFFICE PRINTING DEVICE William L. McCarter,Portland, reg., assignor of one-half to C. H. Farrington, Portland,Oreg.

Application May 6, 1939, Serial No. 272,197

12 Claims. (Cl. 101-214) My invention relates to printing presses forprinting on paper, or the like, and it relates more particularly to anattachment for existing presses for printing supplementary matter incolor. There are in use a large number of printing presses that givegood service in printing in black, or in any one color, but which arenot adapted to print more than one color on the same sheet. In manycases, such for example as in printing newspapers, the value of thesepresses would be considerably increased by an attachment that wouldrender them suitable for multi-color printing.

The pro-vision of such an attachment has, however, met with considerabledifficulty in that, for one reason, it has not been found possibleheretofore to print supplemental matter on paper Without disturbing itspath through the existing press, and said disturbance has necessitatedcareful reorganization of the entire machine, a procedure unjustifiablyexpensive. I propose to provide an attachment for a printing pressadapted to print on paper at some point on its normal path through saidpress, without disturbing the normal travel of said paper along saidpath.

A further reason for the aforesaid difiiculty arises from the fact thatthe available locations for an attachment for an existing printing pressare subject to considerable vibration, resulting n in an irregularapplication of force between the type and whatever backing material isused on the other side of the paper. eliminate said vibration by heavyconstruction of the attachment inasmuch as the press itself is notordinarily sufficiently sturdy in those parts on which an attachmentmight be mounted; it is usually necessary to mount said attachment onthe uppermost portion of the press.

In their most common form, printing presses L0 have embodied metal typepositioned either upon the surface of a cylindrical roller or upon afiat bed. The paper to be printed has been squeezed between said typeand a backing member carrying the impression of said type in intaglio,the 45 backing member registering precisely with said type at all times.The amount of vbration to which an attachment is subjected would beintolerable with metal type. The paper would be torn by vibration in aplane parallel to itself, s and it would be punched by vibration in aplane normal to itself, that is, the type would tend to pierce thepaper. Furthermore, said vibration would result in damage to said metaltype and its intaglio image in the backing material and the printingwould blur on the paper.

My invention is particularly adapted to be used on flatbed web typepresses. In a press of this character, the paper moves as a continuousweb through the machine and is intermittently 6O fed to the printing orimpressing mechanism.

It is impractical to It moves at a more or less uniform speed throughthe forming, folding and cutting mechanism and tension producing devicesmust thus be provided between the impression mechanism and the foldingmechanism for taking up the slack produced by the intermittent feedthrough the impression mechanism. As the web moves to the formingmechanism, it passes over a series of guide rollers. One of said guiderollers has a peripheral speed greater. than the webs speed, and saidroller thus slips on the web and is designed to maintain a predetermineddegree of tension in the web.

There is no convenient location adjacent the impression mechanism forproviding an imprinting device. The web also moves at a varying speed soas not to be adapted tobe printed conveniently by a printing device. Theslack takeup mechanism also provides no convenient location, and as theweb moves to the forming mechanism, it is threaded about a series ofrollers which are of relatively small diameter, vibrate substantiallyand which if driven at all are not driven synchronously with the speedof the web.

I have discovered that I can provide an imprinting device adjacent theforming portions of a web type press by providing a printing rollercarrying rubber type faces or type faces having a certain factor ofresiliency so that any vibration present can be absorbed by the typefaces.

Also, the resiliency of said type faces permits them to correspond tothe arcuate surface of the rollers in this portion of the machine. Thisis not possible with metal type and any other type of printing devicewith which I am familiar produces frequent web breakage because of theeffect of said imprinting device upon the paper for the reasonsheretofore enumerated. Poor printing also results and inaccuracy ofregistration is so prevalent that said imprinting devices were deemedimpractical. With an imprinting device having said resilient type faces,the latter are adapted not only to co-operate with rollers moving eitherfaster or slower than the web, but said imprinting device with said typeof type faces is.

modate said type because this type has suflicient resiliency in itselfto accommodate the constantly differing operating pressures which areproducedby the conditions which exist at this point. If said type facesare made of rub-v her, they require such very light pressure for goodprinting that good printing is obtainable even under these adverseconditions.

The principal object of my invention is to provide an imprintingattachment for an existing printing press and particularly one for colorprinting that can be easily attached to said press without changing thepath of the paper therethrough. I attain said object by providing aprinting roller having rubber type faces adapted to bear against saidpaper so lightly that the backing roller therefor need not travel at thesame speed as the paper, and that will yield under vibration and operatesuccessfully despite the vibration to which said attachment willnecessarily be subjected.

A further object of my invention is to provide a printing roller whoseposition with respect to a backing roller is adjustable, said. backingroller remaining stationary.

A further object of my invention is to provide means for automaticallycompensating the angular position of a printing roller of a printingattachment for the irregular longitudinal motion of the paper when saidattachment is used with a flat-bed web press in which the printingoperation proceeds alternately in opposite directions along the paper.Said compensation is necessary to prevent faulty registration of thematter printed by the attachment with that previously printed.

A further object of my invention is to provide a plurality of rollersadapted to be moved laterally to carry ink from an ink roller to anotherstationary roller from which said ink is carried to the printing roller,said movable rollers being in contact with each other to carry inkprogressively from one to another. Laterally movable single rollers haveheretofore been used to carry ink, but a single roller does not spreadink uniformly over its surface while moving, whereas a plurality ofrollers transferring ink from one to the other and squeezing ittherebetween effectively spread said ink. Uniform distribution of ink onthe printing rolls is an important matter in all printing operations,and it has heretofore been known that said distribution might beeffected by a series of rollers. I have found that space can be saved,and better distribution of ink achieved with an attachment having aseries of laterally movable rollers; and I prefer that said rollers beof different diameters.

A further object of my invention is to provide a yieldable support for alaterally movable roller adapted to carry ink from an ink roller to aprinting roller, or to other rollers leading thereto, whereby the travelof said movable roller will be automatically caused to conform to thedistance between said rollers. The significance of said yieldablefeature will be readily apparent when it is considered that I propose tomove the aforesaid printing roller laterally to vary the distancebetween it and the backing roller, but I do not wish to move the inkroller, and its accompanying mechanism. It follows that the distancebetween the ink roller and the printing roller will be subjeot tochange, and it is desirable that the aforesaid travel of theink-carrying roller shall conform to such change without manualadjustment.

A further object of my invention is to provide control means whereby aprinting attachment maybe caused to print precisely in a predeterminedposition relative to matter previously printed on the same paper. Iattain said object by so arranging the printing roller of saidattachment that it may readily be moved longitudinally of itself, whichis laterally with reference to the paper being printed, until the typethereon is properly located laterally on said paper. I also providemeans whereby said printing roller may be rotated independently of saidpaper for the purpose of moving said type to the proper locationlongitudinally thereof. I deem it preferable, in a printing attachment,to move the printing roller rather than the paper in bringing the twointo their proper juxtaposition.

This application is a continuation in part of my co-pending applicationentitled Color-printing attachment for printing presses filed in theUnited States Patent Office May 11, 1938, Serial No.

Other objects and advantages will be disclosed with reference to theaccompanying drawings, in which:

Fig. 1 is a side elevation of a printing press and an attachmenttherefor embodying my invention;

Fig. 2 is a fragmentary perspective view of the upper portion of theprinting press shown in Fig. 20

1, the paper therein being arranged to follow a different path, and theprinting attachment being shown by dotted lines in a different position,along the side of said press;

Fig, 3 is a fragmentary View of a portion of a printing press in whichthe attachment of Fig. 1 is arranged to print against a stationary metalsurface instead of against a roller;

Fig. 4 is a foreshortened plan view of the attachment of Fig. 1,together with fragments of Fig. 9 is a sectional detail View taken onthe line 9-9 in Fig. 4 with parts shown broken away to illustratedetails-of construction; I

Fig. 10 is a section taken along the line lit-I0 in Fig. 4, the inkcarrying rollers being shownin their rearward position;

Fig. 11 is an enlarged front elevation of the compensator shown in Fig.4;

Fig. 12 is a back view of the compensator shown in Fig. 11;

Fig. 13 is a plan view of said compensator, a portion thereof beingshown broken away to disclose the internal structure;

Fig. 14 is [an enlarged, foreshortened plan view of the printing rollershown in Fig. 4, a portion thereof being shown broken away to disclosethe blanket tightening shaft therein;

Fig, 15 is an end view of said printing roller;

Fig. 16 is an enlarged fragmentary sectional view taken substantiallyalong the line-H5 46 in Fig. 14, showing the manner in which the blanketis attached to said printing roller;

Fig. 17 is a plan view of said blanket superpose on a copy sheet onwhich there is printed matter, 1 a patch of rubber type being shownattached to i said blanket, and another patch being shown par- .tiallyattached thereto;

Fig, 18 is a fragmentary sectional view taken along the line [8-48 inFig. 17, the sections of rubber type, adhesive material, and transparentblanket being shown separated;

roller and a backing roller, the position assumed by said printingroller during vibration being shown on an exaggerated scale bydot-and-dash lines; and

' Fig. 20 is an enlarged, fragmentary perspective View of said printingroller and said backing roller showing on an exaggerated scale themanner in which the rubber type on said printing roller yields duringvibration.

One type of printing press I, to which my invention is adapted to beattached, comprises a main frame 2 on which a roll of paper 3 may berotatably supported on trunnions 4. Said paper is unrolled from saidroll in the form of a web, shown in Fig. 1 by dot-and-dash lines.

Said web extends rearwardly from said roll over reciprocating roller 5,around impression roller 6 back under impression roller 1 aroundreciprocating roller 8 and thence to the forming and folding and cuttingmechanism hereinafter-more fully described. Impression rollers 6 and Tare carried by crosshead 9 adapted to be reciprocated by side rod I0driven by crankpin ll carried by gear wheel l2 driven by pinion I3fixedly se- I cured to shaft I4 which carries pulley wheel. [5 adaptedto be rotated by belt l6. Said belt 16 may be driven by any suitablesource of power, not shown.

As is well known in the printing art, the aforesaid press is a two-wayflat-bed press and is adapted to print on both sides of a web ofpaperimpression roller 6 printing on one side and impression roller 7 onthe other. Furthermore, and more pertinent to my invention, each of saidimpression rollers is adapted to print during movement in bothdirections of crosshead 9. Because the printing Operation in a two-waypress tends to vary slightly the speed of the web in accordance with thedirection the impression roller moves, printing during movement of theimpression roller in opposite directions gives rise to an irregularmovement of the web commonly known as hop. The magnitude of thisvariation in speed will vary considerably, but, in general, it may giverise to a displacement of the web of from one-quarter inch to one-halfinch, compared to a uniformly moving web. My invention is not limited toa two-way press but is adapted to any fiat-bed web press.

It is well known that reciprocating rollers 5 and 8 are givena'substantially vertical motion, as shown in Fig. 1, in synchronism withthe motion of crosshead 9 for the purpose of moving the web the properamount, between strokes of said crosshead, to bring it in the correctposition for printing. However, said reciprocating rollers do notprevent the aforesaid hopping 'of the web. It is apparent that saidhopping will tend to vary the position of matter printed by anattachment with respect to that printed previously by the printingpress, that is, hopping will spoil the register of the matter printed bythe attachment unless it is compensated. I hereinafter describe meansfor said compensation, and said means forms an important part of myinvention.

In the mode of application of my invention that I prefer, the printingroller thereof is arranged against one of the forming rollers of anordinary printing press, such as roller ll, shown in Fig. 1. Said rolleris carried by the upper portion of the frame and a substantial distanceabove the base of the latter. Said roller is driven by sprockets andchains and appropriate gearing from shaft 18 which carries gear wheell2. It will be understood that, in different presses, the manner ofdriving said forming roller will vary somewhat, but insofar as the modeof application of my invention now being considered is concerned, saiddrive mechanism is unimportant.

It is common practice to drive the forming roller IT, at a peripheralspeed somewhat greater than that of the web to take up the slack in theweb and keep it taut. The operation of the printing press does notpermit of any change in the speed of said roller. It is intended thatthe web shall slip slightly thereon.

Alternatively, an attachment embodying my invention may be locatedagainst any other available smooth roller in the former of said press,such, for example, as roller [9 which is not driven except by the web,or it may be located against any flat, smooth stationary surface at saidpoint over which said web passes such as that shown in Fig. In any case,I prefer to drive my printing roller accurately at the same peripheralspeed as the web speed.

Referring now more particularly to the structure embodying my invention,a printing roller 2i] adjustably mounted on shaft 2| carried by bearings22 is adapted to carry rubber type, hereinafter more fully described.Collars 23 threaded on said shaft 2| at either end of said roller areadapted to move the latter endwise, thereby to position said typecorrectly laterally of the web. Nuts 24 threaded on rods 25 may .beturned to move said printing roller toward or from forming roller H,which now serves as a backing or impression roller, that is, the web ispressed lightly against said backing roller by said rubber type.

The position of said printing roller is adjustable vertically by slidingclamps 26 up or down on posts 21, thereby providing a further adjustmentwith respect to said backing roller. Said clamps may be secured by capsscrews 23, and rods 25 may be threaded firmly in said clamps. It will beunderstood that, whereas rods 25 and clamps 26 are part of theattachment embodying my invention, posts 21 and brackets 29 supportingbacking roller l1 and roller iii are part of the original printingpress.

In any printing operation, it is necessary that ink be supplied to thetype uniformly, and it is also necessary that said ink be supplied ata';

rate that can be varied to suit different con ditions. To this end, ithas heretofore been found that one of the rollers carying said inkshould move alternately back and forth longitudinally to spread said inkuniformly, and I provide an oscillating roller 38 adapted to be movedendwise by fork 3i pivotally mounted on pin 32 and carrying a roller 33adapted to engage the side face of cam 3%, said face being arrangedobliquely with respect to its axis of rotation. Spring 35 is provided toretract said fork after it has been thrust outward by said cam face.

In order to carry ink from said oscillating roller to said printingroller I provide two rollers 36, both adapted to make contact throughoutthe length of both'printing roller 23 and oscillating roller 30. Saidrollers 36 may, if desired, be made of rubber. However, it isundesirable that rubber rollers be allowed to stand for even a few hoursin contact with other rollers, since flat surfaces would be therebyproduced on said rubber rollers. I, therefore, mount oscillating roller38 on brackets 31 pivotally mounted on pins 38. When the machine is shutdown, an

attendant may remove the uppermost one of rollers 36 and lift roller 86upward and backward, out of contact with the lowermost one of rollers36. I prefer to support said rollers 36 in open bearings, from whichthey may readily be removed. I drive oscillating roller 36 by a pinion39 fixedly secured to shaft 46 as is said roller 36. Pinion 39 mesheswith pinion 4| which is adapted to mesh with gear 42 when saidbrackets'31 are lowered. Said gear 42 is affixed to shaft 2| and adaptedto be driven thereby.

An ink fountain 43 is adapted to supply ink to ink roller 44 in theusual way. Said ink roller is supported by shaft 45 which carriesratchet wheel 46 adapted to be driven by dog 41 carried by lever 48which also carries at its opposite end roller 49 adapted to follow theirregular periphery of cam 34. Said lever 48 is fixedly secured to shaft56 which carries lugs 5|, one near either end, adapted to engage springs52 carried by brackets 53. Said brackets are journalled loosely on saidshaft, and are free to be rotated thereon by lugs 5| acting throughsprings 52. Said brackets 53 are adapted to carry three rollers, 54, 55,and 56, and to move said rollers laterally in response to the action ofcam 34.

As cam 34 causes brackets 53 to move back and forth, rollers 54 and 56alternately come in contact with ink roller 44 and oscillating roller36, respectively, at the end of the stroke, thereby carrying ink fromsaid ink roller to said oscillating roller from whence it goes to theprinting roller. I prefer to make said rollers 54 and 56 of a rubbercompound and to make them, and roller 55, of difierent diameters inorder that irregularities on the surface of one roller will notrepeatedly meet the same portion of adjacent rollers.

I desire that said rollers 54, 55, and 56 shall r0- tate to spread theink thereon, but I do not wish to provide special means for rotatingthem, such as gears or pulley wheels, because of the difficulty inproviding said special means for movable rollers. I, therefore, providethe aforesaid springs 52, one of which permits roller 56 to remain incontact with roller 36, which is driven, for a substantial time at theend of each stroke. Said roller 56 thereby acquires rotary motion fromsaid roller 36, and transmits the same to rollers and 54. The other ofsaid springs 52 permits roller 54 to yieldably contact ink roller 44.When brackets 53 are swung forward by spring'58, acting on lever 58awhich is fixedly secured to shaft 56, roller 54 is adapted to be liftedslightly by said ink roller, as is shown in Fig. 6. Then, when cam 34forces said brackets back against the tension of said spring 58, inkroller 44 is rotated slightly by dog 41, thus bringing a freshly inkedportion of said ink roller into position to contact roller 54 on thenext stroke.

As mentioned, the hop of the web produced by printing operations carriedon alternately'in opposite directions in a two-way press tends to causethe imprinted matterto register differently with alternate impressionsof the original printing. To prevent said faulty registration I providea register compensator, shown more clearly in Figs. 11 to 13, adaptedalternately to increase and decrease the speed of the printing rollerbetween impressions, thereby moving said roller back or ahead slightlywith respect to the web.

Roller I! (see Fig. 1) is part of the original printing press, and it isdriven at a definite speed with' respect to the web. "I" afiix pinion 56'to shaft'66 on which said roller I1 is mounted. Said pinion 59 isadapted to mesh with ring gear-6l which is rotatably carried by hub 62journalled on inner hub 63 which is keyed on shaft 2 I. Said gear 6|,however, is free to rotate on said inner hub only part of a revolution,being restrained by spring 64 engaging bolt' 65, or by nuts 66 threadedon said bolt. Said bolt passes through boss 61 on clamping ring 68secured to hub 62 by bolts 69. The purpose of said clamping ring will behereinafter described.

Between spring 64 and nuts 66 on bolt 65, lever 16 constructedintegrally with inner hub 63 is positioned, said lever rotating withshaft 2|. Cam H secured to rod 12 journalled in hub 62 is adapted toengage roller 13 carried by lever 16 at the end thereof opposite bolt65. When said cam is rotated, it will cause shaft 2| to move forward andbackward, alternately, with respect to gear 6|, or, in other words, itwill cause printing roller 20 to move slightly forward or backward withrespect to the web. I wish to so move said printing roller at the propertime and the proper amount to compensate for the hop of the'web.

I, therefore, provide a star wheel 14 on the end of rod 12 oppositeroller I3, and I position a pin 15 (see Figs. 4 and 6) to engage saidstar wheel as the latter revolves with gear 6! about shaft 2|, therebyrotating said star wheel with respect to said gear.

The aforesaid movement of printing roller 26 with respect to the webshould take place between impressions, that is when the margin of theprinted matter is opposite said roller, at which time the rubber typecarried by said printing roller is not in contact with the web. Starwheel 14 has twice as many lobes as has cam H in order that printingroller 26 shall be moved in opposite directions alternately,corresponding to the irregular motion of the web. In order that saidmovement of said printing roller may be adjusted to occur at the marginof the printed matter, I prefer to secure said pin 15 by means of nut 16in an arcuate slot 11, whereby said pin may be moved along the pathtraversed by said star wheel when revolving about shaft 2|.-

I have hereinbefore described means by which printing roller 26, and thetype thereon, may be moved laterally of the web properly to locate thehereinbefore described whereby ring gear 6| is clamped to hub 62 byclamping ring 68 and bolts 69. To rotate said printing roller, withoutmoving said web, it is necessary only to loosen said bolts, whereuponsaid roller may be rotated freely.

The method and means for attaching rubber type to a printing rollerwhich I prefer to use with my present invention is the subject of acopending application for United States patent for a Method and meansfor mounting and registering printing elements, Serial No. 296,273 filedSeptember 23, 1939. Suffice it is to say here that, when a copy has beenprepared on which it is desired to imprint special matter, say, in red,said copy may' be placed face down over a glass panel thru whichsufiicient lightshines to enable a person looking down on it to see theprinted matter thru the copy paper. I then place a transparentblanket86, which may be made of some such material as Celluloid, oversaid copy. I then place rubber type, in small patches, such as 84 and85, as needed, on said blanket, fastening said type to said blanket bymeans of sheet adhesive material. Then I place said blanket aroundprinting roller 20, fastening it by hookingeyelets 18 on pins 19,fixedly secured to said roller, wrapping said blanket around said rollerand hooking eyelets 80 on pins 81. Said pins 8| are affixed to shaft 82,and rotation of said shaft by spring 83 tends to tighten said blanket onsaid roller.

It will be seen that, by this method and means, I can see the printedmatter of the copy sheet while placing the patches of rubber type, and Ican, therefore, properly place said patches with respect'to said printedmatter. Then, when said blanket is in place on the printing roller, itis only necessary to shift the whole'with respect to the web, ashereinbefore described, in order to assure perfect register of theimprinted matter with the original printing. Because the printing rollerof the present invention must ordinarily be placed near the top of aprinting press where it is not easily accessible, the aforesaid methodof attaching rubber type to a printing roller is particularly usefulinasmuch as the precise work of placing the rubber type on a blanket isdone on a table, instead of on the printing roller. It is then a simplematter to attach said blanket to the printing roller, which may belocated in a place so inaccessible as to preclude its use with the oldermethods of attaching type.

In Fig. 18, portions of patch 84 and blanket 86 are shown with a layerof adhesive material between them, said parts being shown separated. InFig. 19, rollers I1 and 2B are shown diagrammatically, the movement ofroller 20 due to vibration being indicated by its position shown indot-and-dash lines, said movement being exaggerated. In Fig. 20, thecompression of the rubber type due to said vibration is shown, alsoexaggerated. However, the condition of said type shown in Fig. 20 is notnormal and it is undesirable, but it is tolerable with rubber type forbrief periods when the press is subject to vibration.

I claim:

1. In a fiat-bed web press comprisinga frame, impression and formingmechanisms, feeding and guiding devices adapted to direct a web of papersuccessively along a path leading past said mechanisms, the formingmechanism being arranged upon that portion of the frame extendingsubstantially above the base thereof, said forming mechanism including amember over which the web is directed while traversing said path, thecombination therewith of an imprinting device having a printing rolleradapted to engage said web, said imprinting device being carried by saidframe, and in operative alinement with said forming member and driven insynchronism with said web.

2. In a fiat-bed web press comprising a frame, impression and formingmechanisms, feeding and guiding devices adapted to direct a web of papersuccessively along a path leading past said mechanisms, the formingmechanism being arranged upon that portion of the frame extendingsubstantially above the-base thereof, said forming mechanism including aroller over which the web is directed while traversing said path, thecombination therewithof an imprinting device having a printing rolleradapted to engage said web, said imprinting device being carried by saidframe, and in operative alinement with said forming roller and driven insynchronism with thereof, said forming mechanism including a member overwhich the web is directed while traversing said path, the combinationtherewith .of an imprinting device having a printing roller adapted toengage said web, said imprinting device being carried by said frame, andin operative alinement with said forming member and driven insynchronism with said web.

4. In a power driven flat-bed web press comprising a frame, impressionand forming mechanisms, feeding and guiding devices adapted to direct aweb of paper successively along a path leading past said mechanisms, theforming mechanism being arranged upon that portion of the frameextending substantially above the base thereof, said forming mechanismincluding a power driven roller driven at such a rate that itsperipheral speed exceeds the speed at which the web is fed thru theforming mechanism over which the web is directed while traversing saidpath, the combination therewith of an imprinting device having aprinting roller adapted to engage said web, said imprinting device beingcarried by said frame, and in operative alinement with said formingroller and driven in synchronism with said web by operative connectionwith said press, rubber type faces secured to said printing roller, saidtype faces being operatively alined with said forming roller, and meansfor rotating said printing roller so that said type faces move at aspeed identical with the web speed.

5. In a flat-bed web press comprising a frame, impression and formingmechanisms, feeding and guidingdevices adapted to direct a web of papersuccessively along a path leading past said mechanisms, the formingmechanism being arranged upon that portion of the frame extendingsubstantially above the base thereof, said forming mechanism including aroller over which the web is directed while traversing said path, thecombination therewith of an imprinting device having a printing rolleradapted to engage said web, said imprinting device being carried by saidframe, and in operative alinement with said' forming roller and drivenin synchronism with said web, resilient type faces secured to saidprinting roller, said type faces being operatively alined with saidforming roller, and means for rotating said printing roller so that saidtype faces move at a speed identical with the web speed.

6. In a flat-bed web press comprising a frame, impression and formingmechanisms, feeding and guiding devices adapted to direct a web of papersuccessively along a path leading past said mechanisms, the formingmechanism being arranged upon that portion of the frame extendingsubstantially above the base thereof, said forming mechanism including aroller over which the web is directed while traversing said path, thecombination therewith of an imprinting device having a printing rolleradapted to engage said web, said imprinting device being carried by saidframe, and in operative alinement with said forming roller and driven insynchronism with .said web, rubber type faces secured to, said printingroller, and means for rotating said printing roller so that said typefaces move at a vspee identical with the web speed. v 1

. 7. In a two-way flat-bed web press comprising a frame, impression andforming mechanisms, feeding and guiding devices adapted to direct a web.of paper successively along a path leading past said mechanisms, theforming mechanism being arranged upon that portion of the frameextending substantially above the base thereof, said forming mechanismincluding a roller over which the web is directed while traversing saidpath, the combination therewith of an imprinting device having aprinting roller adapted to engage said web, said imprinting device beingcarried by said frame, and in operative alinement with said formingroller and driven in synchronism with said web, and means for saidprinting roller to vary the relative position of the latter.

during predetermined periods of alternate rotations of said printingroller.

8. In a two-way flat-bed web press comprising a frame, impression andforming mechanisms, feeding and guiding devices adapted to direct a webof paper successively along a path leading past said mechanisms, theforming mechanism being arranged upon that portion of the frameextending substantially above the base thereof, said forming mechanismincluding a roller over which the web is directed while traversing saidpath, the combination therewith of an imprinting device having aprinting roller adapted to engage said web, said imprinting device beingcarried by said frame, and in operative alinement with said formingroller and driven in synchronism with said web, and a registercompensating device for said printing roller to vary the relativeposition of the latter during predetermined periods of alternaterotations of said printing roller.

9. In a two-way fiat-bed web press comprising a frame, impression andforming mechanisms, feeding and guiding devices adapted to direct a webof paper successively along a path leading past said mechanisms, theforming mechanism being arranged upon that portion of the frameextending substantially above the base thereof, said forming mechanismincluding a roller over which the web is directed while traversing saidpath, the combination therewith of an imprinting device having aprinting roller adapted to engage said web, said imprinting device beingcarried by said frame, and in operative alinement with said formingroller and driven in synchronism with said web, and a registercompensating device for said printing roller to vary the relativeposition of the latter during predetermined periods of alternaterotations of said printing roller, said register compensating devicecomprising a cam rotatably carried by the printing roller, and offsetfrom the axis of rotation of the latter, a

'lever secured to said roller, a relatively fixed stop extending intothe path of the cam when it is revolved about the axis of rotation ofthe printing roller thereby to engage said cam and. rotate'it to adifferent position, said cam opera tively'engaging said lever wherebywhen said cam is engaged by said stop and moved to a different position,said lever and thereby said printing .roller will be rotated slightlywith reupon which said printing roller operates.

. 10. In a printing press having a mainframe and a former disposed atthe discharge, end thereof, the combination of a supplemental framedisposed above the former, a printing roller rotatably carried by thesupplemental frame, an impression roller disposed between the printingroller and the end of the former, gear driven to the said one of saidink transfer rollers, an-

other of said rollers being rotatably and slidably mounted withintheframe and with respect to said transfer rollers for distributing inkuniformly thereover.

1 1. In a' printing press having a mainframe,

'a printing roller, an impression roller and guide rollers associatedtherewith fordirecting a. web

through the press, and a former arranged at the discharge end of thepress, the combination of a supplemental frame disposed above theformer, a'supplemental printing roller rotatably carried by thesupplemental frame, a supplemental impression roller disposed betweenthe supplemental printing roller and the end of the former, gearspect tosaid cam, and with the web of paper driven guide rollers arrangedadjacent the sup- .plemental impression roller and the former, an

idling guide roller associated with the gear driven guide rollers, andmeans for applying ink to the supplemental printing roller, whereby aweb printed by the main printing roller may receive additional printingupon emerging from the press and passing between said supplementalprinting roller and supplemental impression roller.

12. In a power driven two-way flat-bed web press comprising a frame,impression and forming mechanisms, feeding and guiding devices adaptedto direct a web of paper successively along a path leading past saidmechanisms, the forming mechanism being arranged upon that portion ofthe frame extending substantially abovethe base thereof, said formingmechanism including a power driven roller driven-at such a rate that itsperipheral speed exceeds the speed at which the web is fed throughtheforming mechanism and overwhich the web is directed while traversingsaid path, the combination therewith of an imprinting y device having aprinting roller adapted to engage said web, said imprinting de vicebeing carried by said frame, and in operative alinement with saidforming roller and driven synchronism with said web by operativeconnection with said press, rubber type faces secured to said printingroller, said type faces being 'operatively alined with said formingroller, means for rotating said printing roller so that'said type facesmove at a speed identical with the web speed, and a registercompensating device for said printing roller to vary the relativeposition

